We have developed the NaI(Tl) array (DALI2) for high efficient measurements in in-beam gamma-ray spectroscopy experiments performed at RI Beam Factory. The design policies of DALI2 are to have high efficiency and high angular resolution by using 160-186 NaI(Tl) detectors, which enable to have a large solid angle and an averaged angular resolution of 9 degree.
The efficiency and energy resolution are obtained to be about 20% and 10%(FWHM) for 1 MeV gamma ray emitted from moving nuclei with beta~0.6, respectively.
By using DALI2, we have performed various experiments such as Coulex, (p,p'), and removal reaction at RIPS and BigRIPS beam line.
I will present the details of DALI2 and the experimental results.